/*******************************************************************************************
 * Copyright (c) 2006-2009 Alex Robson, Rob Simmons, Craig Israel, and Rachel Twyford
 *
 * Use of this software in any form requires that you have both 
 * read and agreed to the following terms:
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the "Software"), 
 * to deal in the Software without restriction, including without limitation 
 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions: 
 *
 * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * Redistributions in binary form must reproduce the above copyright notice, 
 * this list of conditions and the following disclaimer in the 
 * documentation and/or other materials provided with the distribution.
 * Neither the name of Nvigorate nor the names of its contributors may 
 * be used to endorse or promote products derived from this software without 
 * specific prior written permission. 
 *
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
 * DISCLAIMED. IN NO EVENT SHALL ANY CONTRIBUTOR BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * ****************************************************************************************/

using System;
using System.Linq;
using System.Reflection;
using Nvigorate.Common;
using Nvigorate.Common.Reflection;
using Nvigorate.Extensions;
using Nvigorate.Relational.Mapping.Index;
using Nvigorate.Relational.Mapping.Interface;
using Nvigorate.Relational.Repository;
using Nvigorate.Relational.Visitors;

namespace Nvigorate.Relational.Navigation
{
    public class PersistableTypeNavigator : TypeNavigatorBase, INavigatePeristableType
    {
        public void Accept(ITypeVisitor visitor)
        {
            Visitor = visitor;
            Traverse(_rootType);
        }

        protected void Traverse(Type type)
        {
            Visitor.Visit(type);
            GetRelatives(type)
                .ForEach(r => Traverse(r, ""));
        }

        protected void Traverse(ITargetRelationship relationship, string suffix)
        {
            if (Visitor.Visited(relationship))
                return;

            Visitor.Visit(relationship, suffix);
            GetRelatives(relationship.RelativeType)
                .ForEach(r => Traverse(r, relationship.RelativeProperty));
        }

        protected Type GetObjectType(PropertyInfo propertyInfo)
        {
            return Reflector.IsEnumerable(propertyInfo.PropertyType) ?
                                propertyInfo.PropertyType.GetGenericArguments().First() :
                                propertyInfo.PropertyType;

        }

        public PersistableTypeNavigator(Type type, ILoadInstruction instruction, IRepositoryMapIndex maps)
        {
            _rootType = type;
            _instruction = instruction;
            _repositoryMapIndex = maps;
        }
    }
}